T18 Sensors ac-voltage Series

Transcription

1 T8 enss ac-voltage eries elf-contained ac-operated senss Features Featuring Z-BM technology, the specially-designed optics and electronics provide reliable sensing without the need f adjustments (most models) T style plastic housing with 8 mm threaded lens mount Models available in opposed, retreflective, diffuse and fixed-field modes ompletely epoxy-encapsulated to provide superi durability, even in harsh sensing environments to P69K nnovative dual-indicat system takes the guesswk out of sens perfmance moniting 2 to 25V ac (3-wire hookup); PT solid-state switch output, maximum load 3 m Models P ensing Mode Range LD Output Model* Opposed Retreflective with ain ontrol Polarized Retreflective Diffuse with ain ontrol Fixed- 2 m (66') 2 m (79") 3 mm (2") 25 mm (") cutoff 5 mm (2") cutoff mm cutoff nfrared 95 nm Visible Red 68 nm nfrared 88 nm T83 T8W3R T8RW3R T8W3L T8RW3L T8W3LP T8RW3LP T8W3D T8RW3D T8W3FF25 T8RW3FF25 T8W3FF5 T8RW3FF5 T8W3FF T8RW3FF * tandard 2 m (6.5') cable models are listed. 9 m (3') cable: add suffix W/3 (e.g., T83 W/3). 4-pin Micro-style QD models: add suffix Q (e.g., T83Q). model with a QD connect requires a mating cable. (ee page 7.) Use polarized models when shiny objects will be sensed. WR... ot To Be Used f Personnel Protection ever use these products as sensing devices f personnel protection. Doing so could lead to serious injury death. These senss do OT include the self-checking redundant circuitry necessary to allow their use in personnel safety applications. sens failure malfunction can cause either an energized de-energized sens output condition. onsult your current Banner afety Products catalog f safety products which meet OH, and standards f personnel protection. Printed in U /5 P/ 2525

2 T8 enss ac-voltage eries Fixed- Mode Overview T8 eries self-contained fixed-field senss are small, powerful, infrared diffuse mode senss with far-limit cutoff (a type of background suppression). Their high excess gain and fixed-field technology allow them to detect objects of low reflectivity, while igning background surfaces. The cutoff distance is fixed. Backgrounds and background objects must always be placed beyond the cutoff distance. Fixed- ensing They of Operation The T8FF compares the reflections of its emitted light beam () from an object back to the sens s two differently aimed detects, R and (see Figure ). f the near detect (R) light signal is stronger than the far detect () light signal (see object, closer than the cutoff distance), the sens responds to the object. f the far detect () light signal is stronger than the near detect (R) light signal (see object B, beyond the cutoff distance), the sens ignes the object. The cutoff distance f model T8FF senss is fixed at 25, 5 millimeters (", 2", 4"). Objects lying beyond the cutoff distance usually are igned, even if they are highly reflective. However, it is possible to falsely detect a background object, under certain conditions (see Background Reflectivity and Placement). n the drawings and discussion on these pages, the letters, R, and identify how the sens s three optical elements (mitter, ear Detect R, and Far Detect ) line up across the face of the sens. The location of these elements defines the sensing axis (see Figure 2). The sensing axis becomes imptant in certain situations, such as those illustrated in Figures 5 and 6. ear Detect Far Detect mitter Receiver lements R Lenses Object ensing Range Object is sensed if amount of light at R is greater than the amount of light at Figure. Fixed-field concept utoff Object B Background ens etup ensing Reliability F highest sensitivity, position the target object f sensing at near the point of maximum excess gain. The excess gain curves f these products are shown on page 5. They show excess gain vs. sensing distance f senss with 25 mm, 5 mm, and mm (", 2", and 4") cutoffs. Maximum excess gain f the 25 mm models occurs at a lens-toobject distance of about 7 mm; f 5 mm models, at about mm; and f the mm models, at about 2 mm. ensing at near this distance will make maximum use of each sens s available sensing power. The background must be placed beyond the cutoff distance. (ote that the reflectivity of the background surface also may affect the cutoff distance.) Following these two guidelines will improve sensing reliability. Background Reflectivity and Placement void mirr-like backgrounds that produce specular reflections. False sens response will occur if a background surface reflects the sens s light me strongly to the near detect, sensing detect (R), than to the far detect, cutoff detect (). The result is a false O condition (Figure 3). To cure this problem, use a diffusely reflective (matte) background, angle either the sens the background (in any plane) so the background does not reflect light back to the sens (see Figure 4). Position the background as far beyond the cutoff distance as possible. n object beyond the cutoff distance, either stationary (and when positioned as shown in Figure 5), moving past the face of the sens in a direction perpendicular to the sensing axis, can cause unwanted triggering of the sens if me light is reflected to the near detect than to the far detect. The problem is easily remedied by rotating the sens 9 (Figure 6). The object then reflects the R and fields equally, resulting in no false triggering. better solution, if possible, may be to reposition the object the sens. R ensing xis s a general rule, the most reliable sensing of an object approaching from the side occurs when the line of approach is parallel to the sensing axis. Figure 2. Fixed-field sensing axis 2 P/ 2525 Banner ngineering p. Minneapolis, M U... Tel:

3 T8 enss ac-voltage eries ol ensitivity The effects of object reflectivity on cutoff distance, though small, may be imptant f some applications. t is expected that at any given cutoff setting, the actual cutoff distance f lower reflectance targets will be slightly shter than f higher reflectance targets (see Figure-of-Merit infmation on page 5). This behavi is known as col sensitivity. F example, an excess gain of (see page 5) f an object that reflects / as much light as the 9% white card is represented by the hizontal graph line at excess gain =. n object of this reflectivity results in a far limit cutoff of approximately 2 mm (.8"), f the 25 mm (") cutoff models f example; thus 2 mm represents the cutoff f this sens and target. These excess gain curves were generated using a white test card of 9% reflectance. Objects with reflectivity of less than 9% reflect less light back to the sens, and thus require proptionately me excess gain in der to be sensed with the same reliability as me reflective objects. When sensing an object of very low reflectivity, it may be especially imptant to sense it at near the distance of maximum excess gain. T8FF R utoff T8FF ens Fixed ensing utoff Background R = ear Detect = Far Detect = mitter Fixed ensing urface Moving Object R e of mitted Beam R = ear Detect = Far Detect = mitter trong Direct Reflection way From ens Figure 3. background problem Figure 4. background solution T8FF utoff T8FF utoff R R,, R = ear Detect = Far Detect = mitter Fixed ensing urface Moving Object R = ear Detect = Far Detect = mitter Fixed ensing urface Moving Object reflective background object in this position moving across the sens face in this axis and direction may cause false sens response. Figure 5. Object beyond cutoff problem reflective background object in this position moving across the sens face in this axis will be igned. Figure 6. Object beyond cutoff solution Banner ngineering p. Minneapolis, M U... Tel: P/

4 T8 enss ac-voltage eries upply Voltage and urrent upply Protection ircuitry Output onfiguration 2 to 25V ac (5/6 Hz) verage current: 2 m Peak current: 2 2V ac, 5 2V ac, 75 25V ac Protected against transient voltages PT solid-state ac switch; three-wire hookup; light operate dark operate, depending on model Light Operate: Output conducts when sens sees its own ( the emitter s) modulated light Dark Operate: Output conducts when the sens sees dark Output Rating 3 m maximum (continuous) Fixed- models: derate 5 m/ above +5 (+22 F) nrush capability: amp f 2 milliseconds, non-repetitive OFF-state leakage current: < microamps O-state saturation voltage: 3 m ac; 5 m ac Output Protection ircuitry Output Response Time Repeatability djustments ndicats onstruction nvironmental Rating Protected against false pulse on power-up Opposed mode: 6 milliseconds O, 8 milliseconds OFF Other models: 6 milliseconds O and OFF OT: millisecond delay on power-up; outputs do not conduct during this time. Opposed mode: 2 milliseconds Other models: 4 milliseconds Repeatability and response are independent of signal strength. on-polarized retro and diffuse models (only) have a single-turn rear-panel ensitivity control (turn clockwise to increase gain). Two LDs (reen and Yellow) reen O steady: power to sens is O Yellow O steady: sens sees light Yellow flashing: excess gain marginal ( to.5x) in light condition PBT polyester housing; polycarbonate (opposed-mode) acrylic lens Leakproof design rated M 6P, D 45 (P69K) onnections 2 m (6.5') attached cable 4-pin Micro-style quick-disconnect fitting Operating onditions Temperature: -4 to +7 (-4 to +58 F) Maximum relative humidity: 9% at 5 (non-condensing) Vibration and Mechanical hock ertifications pecifications ll models meet Mil. td. 22F requirements. Method 2 (Vibration; frequency to 6 Hz, max., double amplitude.6" acceleration ). Method 23B conditions H& (hock: 75 with unit operating; f non-operation) 4 P/ 2525 Banner ngineering p. Minneapolis, M U... Tel:

5 T8 enss ac-voltage eries Perfmance urves xcess ain Beam Pattern xcess ain Perfmance based on use of a 9% reflectance white test card. Opposed. m (.33') m (3.3') T8 eries DT Opposed Mode m (33') m (33') 5 mm mm 5 mm 5 mm mm 5 mm T8 eries Opposed Mode 5 m (6') m (32') 5 m (49') DT 2 m (66') 25 m (82') 6" 4" 2" 2" 4" 6" Fixed- 25 mm. mm (.4") mm (.4") T8 eries DT Fixed-field mode with 25 mm far limit cutoff mm (.4") mm Ø mm spot 8 mm focus Ø mm spot 25 mm cutoff Using 8% gray test card: utoff distance will be 95% of value shown. Using 6% black test card: utoff distance will be 9% of value shown. Retreflective. m (.33'). m (.33') T8 eries DT on-polarized Retro m (3.3') m (33') 2 mm 8 mm 4 mm 4 mm 8 mm 2 mm T8 eries on-polarized Retro.5 m (.6'). m (3.2').5 m (4.8') DT 2. m (6.4') 2.5 m (8.') 4.7" 3.2".6".6" 3.2" 4.7" Fixed- 5 mm. mm (.4") mm (.4") T8 eries DT Fixed-field mode with 5 mm far limit cutoff mm (.4") mm Ø mm spot mm focus Ø mm spot 5 mm cutoff Using 8% gray test card: utoff distance will be 9% of value shown. Using 6% black test card: utoff distance will be 85% of value shown. Polarized Retro. m (.33'). m (.33') T8 eries DT Polarized Retro m (3.3') m (33') 5 mm mm 5 mm 5 mm mm 5 mm T8 eries Polarized Retro.5 m (.6'). m (3.2').5 m (4.8') DT 2. m (6.4') 6" 4" 2" 2" 4" 6" 2.5 m (8.') Fixed- mm. mm (.4") mm (.4") T8 eries DT Fixed-field mode with mm far limit cutoff mm (.4") mm Ø mm spot 2 mm focus Ø mm spot mm cutoff Using 8% gray test card: utoff distance will be 85% of value shown. Using 6% black test card: utoff distance will be 75% of value shown. Diffuse 3 mm mm (.4") mm (.4") T8 eries Diffuse mode DT mm mm 5 mm mm 5 mm 5 mm mm 5 mm T8 eries Diffuse Mode 8 mm 6 mm 24 mm 32 mm (3.2") (6.4") (9.6") (2.8") DT 4 mm (6").6".4".2".2".4".6" Focus and spot sizes are typical. Perfmance based on use of a model BRT-3 retreflect (3" diameter). ctual sensing range may be me less than specified, depending on the efficiency and reflective area of the retreflect used. Banner ngineering p. Minneapolis, M U... Tel: P/

6 T8 enss ac-voltage eries abled Models Dimensions QD Models Jam ut (upplied) M8 x Thread ø 5 mm (.59") 3. mm (.8") ø 4. mm (.57") ø 4. mm (.57") reen LD Power ndicat Yellow LD Output ndicat 5.5 mm (2.3") ingle-turn ensitivity (ain) ontrol (D and L Models) 66.5 mm (2.62").5 mm (.45") Hookups abled mitters QD mitters (4-pin Micro-tyle) bn bu 2-25V ac rd/bk rd/wh rd gn 2-25V ac o onnection ll Other abled Models ll Other QD Models (4-pin Micro-tyle) bn bu bk Load 2-25V ac rd/bk rd/wh rd Load gn 2-25V ac o onnection 6 P/ 2525 Banner ngineering p. Minneapolis, M U... Tel:

7 T8 enss ac-voltage eries Quick-Disconnect (QD) ables tyle Model Length Dimensions Pinout 4-pin Micro-style traight MQ-46 MQ-45 MQ-43 2 m (6.5') 5 m (5') 9 m (3') 44 mm max. (.7") ø5 mm (.6") ø /2-2UF-2B Red Wire reen Wire 38 mm max. (.5") Red/White Wire Red/Black Wire 4-pin Micro-style Right-angle MQ-46R MQ-45R MQ-43R 2 m (6.5') 5 m (5') 9 m (3') 38 mm max. (.5") /2-2UF-2B ø 5 mm (.6") WRRTY: Banner ngineering p. warrants its products to be free from defects f one year. Banner ngineering p. will repair replace, free of charge, any product of its manufacture found to be defective at the time it is returned to the facty during the warranty period. This warranty does not cover damage liability f the improper application of Banner products. This warranty is in lieu of any other warranty either expressed implied. P/ 2525 Banner ngineering p., 974 Tenth ve. o., Minneapolis, M U 5544 Phone: mail: senss@bannerengineering.com